Ubuntu and windows 8.1

[RentGPU]

I tried to install ubunt 16.04 beside windows 8.1 on same machine incase i need to switch between OSs to get max profitability as some coins miners works better on ubuntu , but here is the problem i faced that when i install the gpu drivers on ubuntu it never reads the total card resources it reads a 3g only outof 4g and 14 compute units outof 32 , no matter how i uninstall and reinstall the drivers still reads the same ,also it reads the card brand correct rx470,....so can you confirm or not confirm this problem because i installed windows beside?, or it's just something else??......thx

[RentGPU]

Seems that ubuntu users don't want to share experience .....